Submit with complaint via this form https://support.google.com/google-ads/workflow/9290386?visit_id=637526088388702736-4071138899&rd=1. Read this google ads policy very carefully https://support.google.com/adspolicy/answer/6008942. If google will remove the ban then you can modify your ads campaign.
Thanks for your in details post with google keyword planner. Yes, Keyword is the main factor for any kind of online business. All investments are spent based on keywords. That's why needed a deep knowledge of Keyword Research. Here are the advanced techniques of keyword research.